பிறழ்வுகளானவை, மரபணு தகவல்களின் மாற்றங்களாகும்.

First page of Muller's 1921 paper on variations.

A young Hermann Muller.

Herman Muller's high school photo.

Hermann Muller in his lab in Austin.

Hermann Muller in Austin, circa 1920s.

Hermann Muller teaching a class at Indiana University.

Hermann Muller receiving his Nobel Prize from the King of Sweden, 1946.

Hermann Muller and some of his staff in the Fly room at Indiana University.

Alfred Hershey and Seymour Benzer at Cold Spring Harbor Laboratory, 1953 Symposium.

Seymour Benzer with a tube of Drosophila.

Seymour Benzer in labcoat.

Seymour Benzer and his pet fly, 1974.

Hermann Muller suffered a bout of depression in the late '20s after his X-ray work. He tried to commit suicide by taking an overdose of pills.

If X-rays can cause mutations, how come doctors and dentists still use them to see inside the body?

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First page of Muller's 1921 paper on variations.